680856 has 32 divisors (see below), whose sum is σ = 1857600. Its totient is φ = 206240.

The previous prime is 680831. The next prime is 680857. The reversal of 680856 is 658086.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (58050).

2⁶⁸⁰⁸⁵⁶ is an apocalyptic number.

680856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

680856 is an abundant number, since it is smaller than the sum of its proper divisors (1176744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680856 is a wasteful number, since it uses less digits than its factorization.

680856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 680856 is about 825.1399881232. The cubic root of 680856 is about 87.9734768552.

The spelling of 680856 in words is "six hundred eighty thousand, eight hundred fifty-six".